Super-Transformation vs Gozen Match, chained and otherwise

[Turd Ferguson]

Player A has a set Gozen Match and a face up monster.
Player B has a Hanzo and a set Super Transformation.

B activates Ninjitsu Art of Super-Transformation, targeting the 2 monsters. A chains Gozen Match. Is player B forced to get a Dark monster, or is it open since NAST's initial activation was legal and the monster is sent to grave before a new monster is summoned.

Part 2:

Assume above scenario, but Gozen Match is already active. Can B activate NAST, reveal a Dark elligible monster in deck to prove legal activation, then get something besides Dark? (Lonefire vs Gozen Match as precedent)

[poemi]

part1:
the NAST activation is legal. as hanzo and other monster sent to the grave before the new monster summoned, player B can summon any attribute monster (eligible for NAST).

part2:
player B can activate NAST if he has eligible monster in the deck (for NAST&gozen). he then can summon any attribute monster when resolving NAST.
yes, it works just like GB's, lonefire, etc.

[Unities]

I wonder if you need to show your opponent that you do have a dark monster for verification or not. =/

[Joenen]

your opponent should ask you to show proof for legal activation, yes.

[ryu991]

so I assume Rivalry of Warlords would work the same way? If I have rivalry already face up they simply cannot activate NAST?

But chaining rivalry to NAST does not stop the summon at all.

[Redshift]

It always depends on the Type of the monsters involved.

[Joenen]

correct. unless the player already controls a white dragon ninja and has another dragon in deck.

[ryu991]

It always depends on the Type of the monsters involved.

In this case there really are not any variables.

All the ninjas are warriors(outside of the karakuri dude whos a machine) all the targets for both trasformation arts are neither warrior nor machine.

[Joenen]

In this case there really are not any variables.

All the ninjas are warriors(outside of the karakuri dude whos a machine) all the targets for both trasformation arts are neither warrior nor machine.

white dragon ninja.

but yes, usually that's not the case.

And of course, if they ever winged-beast/sea serpent etc ninjas, which i'm sure they will.

[Redshift]

In this case there really are not any variables.

All the ninjas are warriors(outside of the karakuri dude whos a machine) all the targets for both trasformation arts are neither warrior nor machine.
The main "Ninja" monster people try to Summon with that card is not in fact a Warrior or a Machine.

[Unities]

your opponent should ask you to show proof for legal activation, yes.

And by proof, do I show my entire deck (like normal verification) or just the potential monster?

[Joenen]

The potential monster should suffice.